TERMUX- bash: ./a.out: Permission denied
You can't execute executable in internel storage because that's mount with noexec in android.
Move that binary somewhere in termux home directory or $PREFIX.
Termux permission denied
As molbdnilo said, you should compile your source file first :
And then execute the binary produced (the default name is a.out)
error: [Errno 13] Permission denied: './configure' when use pip3 install matplotlib on termux
i have fixed this by use this command
pkg install freetype pkg-config
pkg-config --cflags freetype2
pip3 install matplotlib